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Question
Submitted by mannde on Thu, 2013-03-14 21:10
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A. A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the...

A. A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet (assume a uniform acceleration). B. Ima Hurryin is approaching a stoplight moving with a velocity of +30.0 m/s. The light turns yellow, and Ima applies the brakes and skids to a stop. If Ima's acceleration is -8.00 m/s2, then determine the displacement of the car during the skidding process. (Note that the direction of the velocity and the acceleration vectors are denoted by a + and a - sign.)

Answer
Submitted by gerard on Thu, 2013-03-14 22:59
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Physics Numericals

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Please, find xxx attachment xxx xxxxxxxx xxx xxx given xxxxxxxxxxx

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A. x xxxxxx xxxxxx a rifle xxxx a xxxxxx velocity xx 521 xxxx xxxxx accelerating through xxx barrel xx xxx rifle, the bullet moves a xxxxxxxx xx xxxxx m. Determine xxx xxxxxxxxxxxx of the bullet (assume a xxxxxxx xxxxxxxxxxxxxx

Solution:

Let xxxxxxx velocity xx xxx final velocity be xxx acceleraton be xx and the xxxxxxxx be xx

xxxxxx vi = 0 xxx x xx = 521 m/s xxx d x xxxxx x

Here we have xx find: a = ??

xx know,

xxx x vi2 x 2*a*d

(521 xxxxx x xx m/s)2 x xxxxxxxxxxxx xx

xxxxxx xxxxx x (0 m/s)2 + (1.68 xxxx

xxxxxxx m2/s2)/(1.68 m) x x

x x xxxxxxxx m /s2

Hence, xxx xxxxxxxxxxxx of the bullet is xxxxxxxx x /s2x

B. xxx Hurryin is approaching x stoplight xxxxxx xxxx a xxxxxxxx xx +30.0 m/s. The xxxxx turns xxxxxxx and xxx applies xxx brakes and skids to a stop. xx xxxxx xxxxxxxxxxxx is -8.00 xxxxx then xxxxxxxxx the xxxxxxxxxxxx xx xxx xxx during the skidding xxxxxxxx xxxxx that the direction of xxx velocity and the xxxxxxxxxxxx vectors are denoted by a x xxx a -

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